/Engine/Source/Runtime/CoreUObject/Public/UObject/Object.h
Saves just the property into the global user ini file for the class (with just the changes from base)
void UpdateSinglePropertyInConfigFile ( const [FProperty](API\Runtime\CoreUObject\UObject\FProperty) * InProperty, const [FString](API\Runtime\Core\Containers\FString) & InConfigIniName )